Abstract:POSITRON EMMISSION TOMOGRAHY (PET) IS A NON-INVASIVE MEDICAL IMAGING TECHNIQUE WHICH PROVIDES AN IMAGE OF A POSITRON EMITTING RADIO PHARMACEUTICAL AND ITS DISTRIBUTION IN THE BODY ON A METABOLIC LEVEL. AT THE PRESENT TIME, THE PERFORMANCE OF THIS INSTRUMENT IS LIMITED BY THE NUCLEAR DETECTORS USED.… more
Abstract:ROBOTS ARE BECOMING INCREASINGLY IMPORTANT THROUGHOUT THE NUCLEAR INDUSTRY. THEY ARE COMMONLY USED TO IMPROVE OPERATIONS AND MAINTENANCE, LOWER OPERATING COSTS, ENHANCE WORKER SAFETY, AND REDUCE RADIATION EXPOSURE TO WORKERS. HOWEVER, THE CAPABILITIES OF EXISTING ROBOTS ARE LIMITEDBY THE SYSTEMS… more
Abstract:The advanced materials and sophisticated designs of metal matrix composite components are being used in modern aircraft designs. To detect flaws and other integrity-reducing anomalies in these new materials and to assure the component reliability and accurate failure rate predictions, nondestructive… more
Abstract:Space optical communications techniques are expected to be of great value when communicating at planetary distances. As opposed to RF systems, the high optical power concentration resulting from the small beam divergence will allow smaller diameter telescopes, less power and jam resistant… more
Abstract:ADVANCES IN SEMICONDUCTOR TECHNOLOGY HAVE RESULTED IN VAST NEW TECHNOLOGICAL CAPABILITIES AND HAVE AFFECTED EVERY ASPECT OF MODERN LIFE. ONE SUCH APPLICATION WHERE ADVANCES IN SEMICONDUCTOR MATERIALS CAN HAVE A SIGNIFICANT IMPACT ON SPACE EXPLORATION IS UV DETECTORS. THE IDEAL UV DETECTOR WOULD BE A… more
Abstract:POSITRON EMISSION TOMOGRAPHY (PET) IS A NON-INVASIVE MEDICAL IMAGING TECHNIQUE, WHICH PROVIDES AN IMAGE OF A POSITRON EMITTING RADIO PHARMACEUTICAL AND ITS DISTRIBUTION IN THE BODY ON A METABOLIC LEVEL. AT THE PRESENT TIME, THE PERFORMANCE OF THIS INSTRUMENT IS LIMITED BY THE NUCLEAR SENSORS USED. … more
Abstract:SILICON AVALANCHE PHOTODIODES (APDS) HAVE BEEN SHOWN TO BE NEARLY AN IDEAL REPLACEMENT FOR PHOTOMULTIPLIER TUBES (PMTS) IN SCINTILLATION DETECTION APPLICATIONS. HOWEVER, BECAUSE OF THEIR GREAT EXPENSE (TYPICALLY APDS COST TEN TIMES AS MUCH AS AN EQUIVALENT PMT) APDS HAVE NOT BEEN WIDELY USED. THE… more
Abstract:THE OVERALL PERFORMANCE AND USEFULNESS OF SCINTILLATOR DETECTORS ARE OFTEN LIMITED BY THE EFFICIENCY OF LIGHT COLLECTION BY THE PHOTOSENSOR USED IN CONJUNCTION WITH THEM. MOST SCINTILLATORS THAT EMIT IN THE ULTRAVIOLET REGION (UV) HAVE NOT BEEN FULLY EXPLOITED, CHIEFLY DUE TO THE DIFFICULTY OF… more
Abstract:THE OBJECTIVE OF THIS PROJECT IS TO DEVELOP A NEW TYPE OF LARGE AREA POSITION SENSITIVE NEUTRON DETECTOR FOR USE IN DIFFRACTION STUDIES. THE DETECTOR WOULD USE A LIQUID CRYSTAL SENSING MECHNISM TO PROVIDE A LARGE AREA HIGH RESOLUTION (COMPARABLE TO PHOTOGRAPHIC METHODS) DETECTORS WHICH WOULD BE… more
Abstract:Environmental monitoring of possible contamination by radioactive materials has created a need for portable measurement systems that can assay low-grade radioactive materials in waste and in process equipment. Currently available instruments for environmental radiation monitoring are either of poor… more
Abstract:Blood coagulation factor IX is absent or deficient in hemophilia B patients. Current therapy, thetransfusion of human whole blood components, is effective, but it is not prophylactic or free of risk.Our long term objective is the development of a somatic cell gene therapy for hemophilia B.… more
Abstract:Alpha Photonic Inc. (API) proposes, to develop an n-type strained layer InGaAs/GaAs multiple quantum well (MOW) structure for normal incident long wavelength (>12 um) infrared (IR) detection. This structure offers high sensitivity and a fast response time. The detection wavelength can be easily… more
Abstract:THERE ARE STRONG MOTIVATIONS FOR THE DEVELOPMENT OF NEW SIGNAL, IMAGE, AND DATA PROCESSING ALGORITHMS THAT ARE WELL-MATCHED TO ATR PROBLEMS AND THUS OFFER PROMISE IN EXPLOITING THE SPECIFIC SPATIO-TEMPORAL CHARACTERISTICS THAT DISTINGUISH TARGETS OF INTEREST FROM ENVIRONMENTAL CLUTTER. IN THIS… more
Abstract:Continuing increases in computing capability present numerous opportunities to assist the staff of a command center as they analyze enemy operations, construct and evaluate courses of action, and monitor the execution of the selected option. Nowhere are these opportunities more critical than in the… more
Abstract:This project will assess the feasibility of developing a method and integrated toolset to represent, design, and evaluate the behavior of large, complex, a real-time Naval systems. ALPHATECH has developed an interactive graphical simulation tool, called Modeler, which supports complex systems design… more
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